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53 lines
1.7 KiB
53 lines
1.7 KiB
"use strict"; |
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Object.defineProperty(exports, "__esModule", { |
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value: true |
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}); |
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exports.default = getISOWeek; |
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var _index = _interopRequireDefault(require("../toDate/index.js")); |
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var _index2 = _interopRequireDefault(require("../startOfISOWeek/index.js")); |
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var _index3 = _interopRequireDefault(require("../startOfISOWeekYear/index.js")); |
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var _index4 = _interopRequireDefault(require("../_lib/requiredArgs/index.js")); |
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } |
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var MILLISECONDS_IN_WEEK = 604800000; |
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/** |
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* @name getISOWeek |
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* @category ISO Week Helpers |
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* @summary Get the ISO week of the given date. |
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* |
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* @description |
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* Get the ISO week of the given date. |
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* |
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* ISO week-numbering year: http://en.wikipedia.org/wiki/ISO_week_date |
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* |
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* ### v2.0.0 breaking changes: |
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* |
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* - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes). |
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* |
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* @param {Date|Number} date - the given date |
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* @returns {Number} the ISO week |
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* @throws {TypeError} 1 argument required |
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* |
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* @example |
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* // Which week of the ISO-week numbering year is 2 January 2005? |
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* var result = getISOWeek(new Date(2005, 0, 2)) |
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* //=> 53 |
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*/ |
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function getISOWeek(dirtyDate) { |
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(0, _index4.default)(1, arguments); |
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var date = (0, _index.default)(dirtyDate); |
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var diff = (0, _index2.default)(date).getTime() - (0, _index3.default)(date).getTime(); // Round the number of days to the nearest integer |
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// because the number of milliseconds in a week is not constant |
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// (e.g. it's different in the week of the daylight saving time clock shift) |
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return Math.round(diff / MILLISECONDS_IN_WEEK) + 1; |
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} |
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module.exports = exports.default; |